Last reviewed: October 13, 2026
"Juice jacking" is when a tampered public USB port or cable is used to access a phone while it charges. The FCC has said it has been shown to be technically possible, though it wasn't aware of confirmed cases. A few simple habits avoid the risk entirely.
Tips for charging safely
- Use a wall outlet with your own charger instead of a public USB port.
- Pack your own cables. Don't use cables left at charging stations or handed out as giveaways.
- Carry a portable battery so you don't need public ports.
- Use a charge-only cable or adapter from a trusted supplier.
- If your phone asks to "trust this computer" or share data, choose charge only.
- Keep your phone updated and use a passcode, so it's harder for anyone to access it.
When a USB port is your only option
A USB data blocker sits between your cable and the port. It lets power through and blocks the data connection, so you can charge from an airport kiosk or hotel lamp without opening a data link to your phone.
Sources: FCC consumer guidance on juice jacking (2023) · FTC: Malware — How to Protect Against, Detect, and Remove It · CISA: Secure Our World